Characterisation of vulcanised natural rubber behaviour by monotonic andin situcyclic X-ray scattering tests
| Autor: | M. Zaghdoudi, Z. Tourki, Pierre-Antoine Albouy |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Vulcanization law.invention Natural rubber law visual_art Ultimate tensile strength Materials Chemistry Ceramics and Composites Hardening (metallurgy) visual_art.visual_art_medium Crystallization Elongation Composite material Softening Curing (chemistry) |
| Zdroj: | Plastics, Rubber and Composites. 44:211-217 |
| ISSN: | 1743-2898 1465-8011 |
| DOI: | 10.1179/1743289815y.0000000011 |
| Popis: | The effect of curing and loading conditions on the mechanical response of natural rubber are investigated by monotonic and in situ X-ray cyclic tensile tests. Tests are conducted on four samples, which differ by vulcanisation conditions. Samples are subject to two strain rates (2.7 × 10− 3 s− 1 and 16.66 × 10− 3 s− 1), and numerous imposed elongation levels range from 450 to 900%. The coupling between the strain rates and the elongation levels on the stress softening evolution resulting from strain induced crystallisation is investigated. In situ thermomechanical tensile cyclic test is performed in order to withdraw the effect of the strain induced crystallisation on the maximum stress decrease. The experimental results analysis shows that an optimum vulcanisation condition (150°C, 30 min) enhances the hardening process in the monotonic loading due to the strain induced crystallisation. However, under optimum curing conditions, cyclic loading induces a large hysteresis loss, a high stress softenin... |
| Databáze: | OpenAIRE |
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